PHP可以检测到不完整的xmlhttprequest.send（data）命令吗？

Question

I'm seeing error logs caused by what appears to be truncation of the post data. After debugging, my guess is that the issue is that we're using an xmlhttprequest to do the post, and the user is closing the browser before the entirety of the post data has been sent.

Here's our js code:

httpReq = new XMLHttpRequest();
httpReq.open("POST", url,false);
httpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
httpReq.send(param);

Is there a way to detect an incomplete send on the PHP side other than finding out there are missing post parameters? (Which we can't do since they're dynamic.)

2011-02-27 Edit:

As an example, the client is sending something like:

&obj1_name=Greeting&obj1_type=string&obj1_value=hello&obj1_id=34

The obj1_id is a required field in order to store the remaining details about the object. But sometimes we receive a string like:

&obj1_name=Greeting&obj1_type=string

My goal is to tell the difference between a broken client (one where it meant to send the short string) that we need to fix, and a working client that was closed too early (one where it meant to send the long string) and we can write off the error as unavoidable.

Answer 1

You can have a look at this function: connection_aborted . This approach will only work if you set ignore_user_abort(true) . The script will now continue to run even if the user hit the abort button. You then have to check the connection_aborted function and discard the data if necessary.

Another approach would be to save some kind of flag at the end of the script to mark the data as completely processed. If that flag is not set, you can discard the data.

Answer 2

I've realized we simply need more info from the client in order to do this. To accomplish this, we've added a known termination value on the client end. If that final parameter isn't set when the server sees it, it was an incomplete submission.

Answer 3

我不会这么想，因为PHP是服务器端的，而XmlHttpRequests是客户端的。